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diff --git a/src/electronics/components/ecsignallamp.h b/src/electronics/components/ecsignallamp.h
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+++ b/src/electronics/components/ecsignallamp.h
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+/***************************************************************************
+ *   Copyright (C) 2003-2005 by David Saxton                               *
+ *   [email protected]                                                    *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ ***************************************************************************/
+
+#ifndef ECSIGNALLAMP_H
+#define ECSIGNALLAMP_H
+
+#include "component.h"
+
+class Resistance;
+
+/**
+@short Signal Lamp - glows when current flows
+@author David Saxton
+*/
+class ECSignalLamp : public Component
+{
+public:
+	ECSignalLamp( ICNDocument *icnDocument, bool newItem, const char *id = 0L );
+	~ECSignalLamp();
+	
+	static Item* construct( ItemDocument *itemDocument, bool newItem, const char *id );
+	static LibraryItem *libraryItem();
+	
+	virtual void stepNonLogic();
+	virtual bool doesStepNonLogic() const { return true; }
+	
+private:
+	void drawShape( QPainter &p );
+	double avgPower;
+	uint advanceSinceUpdate;
+};
+
+#endif